1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Honeywell TruStability HSC Series pressure/temperature sensor 4 * 5 * Copyright (c) 2023 Petre Rodan <petre.rodan@subdimension.ro> 6 * 7 * Datasheet: https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/products/sensors/pressure-sensors/board-mount-pressure-sensors/trustability-hsc-series/documents/sps-siot-trustability-hsc-series-high-accuracy-board-mount-pressure-sensors-50099148-a-en-ciid-151133.pdf 8 */ 9 10#include <linux/array_size.h> 11#include <linux/bitfield.h> 12#include <linux/bits.h> 13#include <linux/cleanup.h> 14#include <linux/init.h> 15#include <linux/math64.h> 16#include <linux/mod_devicetable.h> 17#include <linux/module.h> 18#include <linux/printk.h> 19#include <linux/property.h> 20#include <linux/regulator/consumer.h> 21#include <linux/string.h> 22#include <linux/types.h> 23#include <linux/units.h> 24 25#include <linux/iio/buffer.h> 26#include <linux/iio/iio.h> 27#include <linux/iio/sysfs.h> 28#include <linux/iio/trigger_consumer.h> 29#include <linux/iio/triggered_buffer.h> 30 31#include <asm/unaligned.h> 32 33#include "hsc030pa.h" 34 35/* 36 * HSC_PRESSURE_TRIPLET_LEN - length for the string that defines the 37 * pressure range, measurement unit and type as per the part nomenclature. 38 * Consult honeywell,pressure-triplet in the bindings file for details. 39 */ 40#define HSC_PRESSURE_TRIPLET_LEN 6 41#define HSC_STATUS_MASK GENMASK(7, 6) 42#define HSC_TEMPERATURE_MASK GENMASK(15, 5) 43#define HSC_PRESSURE_MASK GENMASK(29, 16) 44 45struct hsc_func_spec { 46 u32 output_min; 47 u32 output_max; 48}; 49 50/* 51 * function A: 10% - 90% of 2^14 52 * function B: 5% - 95% of 2^14 53 * function C: 5% - 85% of 2^14 54 * function F: 4% - 94% of 2^14 55 */ 56static const struct hsc_func_spec hsc_func_spec[] = { 57 [HSC_FUNCTION_A] = { .output_min = 1638, .output_max = 14746 }, 58 [HSC_FUNCTION_B] = { .output_min = 819, .output_max = 15565 }, 59 [HSC_FUNCTION_C] = { .output_min = 819, .output_max = 13926 }, 60 [HSC_FUNCTION_F] = { .output_min = 655, .output_max = 15401 }, 61}; 62 63enum hsc_variants { 64 HSC001BA = 0x00, HSC1_6BA = 0x01, HSC2_5BA = 0x02, HSC004BA = 0x03, 65 HSC006BA = 0x04, HSC010BA = 0x05, HSC1_6MD = 0x06, HSC2_5MD = 0x07, 66 HSC004MD = 0x08, HSC006MD = 0x09, HSC010MD = 0x0a, HSC016MD = 0x0b, 67 HSC025MD = 0x0c, HSC040MD = 0x0d, HSC060MD = 0x0e, HSC100MD = 0x0f, 68 HSC160MD = 0x10, HSC250MD = 0x11, HSC400MD = 0x12, HSC600MD = 0x13, 69 HSC001BD = 0x14, HSC1_6BD = 0x15, HSC2_5BD = 0x16, HSC004BD = 0x17, 70 HSC2_5MG = 0x18, HSC004MG = 0x19, HSC006MG = 0x1a, HSC010MG = 0x1b, 71 HSC016MG = 0x1c, HSC025MG = 0x1d, HSC040MG = 0x1e, HSC060MG = 0x1f, 72 HSC100MG = 0x20, HSC160MG = 0x21, HSC250MG = 0x22, HSC400MG = 0x23, 73 HSC600MG = 0x24, HSC001BG = 0x25, HSC1_6BG = 0x26, HSC2_5BG = 0x27, 74 HSC004BG = 0x28, HSC006BG = 0x29, HSC010BG = 0x2a, HSC100KA = 0x2b, 75 HSC160KA = 0x2c, HSC250KA = 0x2d, HSC400KA = 0x2e, HSC600KA = 0x2f, 76 HSC001GA = 0x30, HSC160LD = 0x31, HSC250LD = 0x32, HSC400LD = 0x33, 77 HSC600LD = 0x34, HSC001KD = 0x35, HSC1_6KD = 0x36, HSC2_5KD = 0x37, 78 HSC004KD = 0x38, HSC006KD = 0x39, HSC010KD = 0x3a, HSC016KD = 0x3b, 79 HSC025KD = 0x3c, HSC040KD = 0x3d, HSC060KD = 0x3e, HSC100KD = 0x3f, 80 HSC160KD = 0x40, HSC250KD = 0x41, HSC400KD = 0x42, HSC250LG = 0x43, 81 HSC400LG = 0x44, HSC600LG = 0x45, HSC001KG = 0x46, HSC1_6KG = 0x47, 82 HSC2_5KG = 0x48, HSC004KG = 0x49, HSC006KG = 0x4a, HSC010KG = 0x4b, 83 HSC016KG = 0x4c, HSC025KG = 0x4d, HSC040KG = 0x4e, HSC060KG = 0x4f, 84 HSC100KG = 0x50, HSC160KG = 0x51, HSC250KG = 0x52, HSC400KG = 0x53, 85 HSC600KG = 0x54, HSC001GG = 0x55, HSC015PA = 0x56, HSC030PA = 0x57, 86 HSC060PA = 0x58, HSC100PA = 0x59, HSC150PA = 0x5a, HSC0_5ND = 0x5b, 87 HSC001ND = 0x5c, HSC002ND = 0x5d, HSC004ND = 0x5e, HSC005ND = 0x5f, 88 HSC010ND = 0x60, HSC020ND = 0x61, HSC030ND = 0x62, HSC001PD = 0x63, 89 HSC005PD = 0x64, HSC015PD = 0x65, HSC030PD = 0x66, HSC060PD = 0x67, 90 HSC001NG = 0x68, HSC002NG = 0x69, HSC004NG = 0x6a, HSC005NG = 0x6b, 91 HSC010NG = 0x6c, HSC020NG = 0x6d, HSC030NG = 0x6e, HSC001PG = 0x6f, 92 HSC005PG = 0x70, HSC015PG = 0x71, HSC030PG = 0x72, HSC060PG = 0x73, 93 HSC100PG = 0x74, HSC150PG = 0x75, HSC_VARIANTS_MAX 94}; 95 96static const char * const hsc_triplet_variants[HSC_VARIANTS_MAX] = { 97 [HSC001BA] = "001BA", [HSC1_6BA] = "1.6BA", [HSC2_5BA] = "2.5BA", 98 [HSC004BA] = "004BA", [HSC006BA] = "006BA", [HSC010BA] = "010BA", 99 [HSC1_6MD] = "1.6MD", [HSC2_5MD] = "2.5MD", [HSC004MD] = "004MD", 100 [HSC006MD] = "006MD", [HSC010MD] = "010MD", [HSC016MD] = "016MD", 101 [HSC025MD] = "025MD", [HSC040MD] = "040MD", [HSC060MD] = "060MD", 102 [HSC100MD] = "100MD", [HSC160MD] = "160MD", [HSC250MD] = "250MD", 103 [HSC400MD] = "400MD", [HSC600MD] = "600MD", [HSC001BD] = "001BD", 104 [HSC1_6BD] = "1.6BD", [HSC2_5BD] = "2.5BD", [HSC004BD] = "004BD", 105 [HSC2_5MG] = "2.5MG", [HSC004MG] = "004MG", [HSC006MG] = "006MG", 106 [HSC010MG] = "010MG", [HSC016MG] = "016MG", [HSC025MG] = "025MG", 107 [HSC040MG] = "040MG", [HSC060MG] = "060MG", [HSC100MG] = "100MG", 108 [HSC160MG] = "160MG", [HSC250MG] = "250MG", [HSC400MG] = "400MG", 109 [HSC600MG] = "600MG", [HSC001BG] = "001BG", [HSC1_6BG] = "1.6BG", 110 [HSC2_5BG] = "2.5BG", [HSC004BG] = "004BG", [HSC006BG] = "006BG", 111 [HSC010BG] = "010BG", [HSC100KA] = "100KA", [HSC160KA] = "160KA", 112 [HSC250KA] = "250KA", [HSC400KA] = "400KA", [HSC600KA] = "600KA", 113 [HSC001GA] = "001GA", [HSC160LD] = "160LD", [HSC250LD] = "250LD", 114 [HSC400LD] = "400LD", [HSC600LD] = "600LD", [HSC001KD] = "001KD", 115 [HSC1_6KD] = "1.6KD", [HSC2_5KD] = "2.5KD", [HSC004KD] = "004KD", 116 [HSC006KD] = "006KD", [HSC010KD] = "010KD", [HSC016KD] = "016KD", 117 [HSC025KD] = "025KD", [HSC040KD] = "040KD", [HSC060KD] = "060KD", 118 [HSC100KD] = "100KD", [HSC160KD] = "160KD", [HSC250KD] = "250KD", 119 [HSC400KD] = "400KD", [HSC250LG] = "250LG", [HSC400LG] = "400LG", 120 [HSC600LG] = "600LG", [HSC001KG] = "001KG", [HSC1_6KG] = "1.6KG", 121 [HSC2_5KG] = "2.5KG", [HSC004KG] = "004KG", [HSC006KG] = "006KG", 122 [HSC010KG] = "010KG", [HSC016KG] = "016KG", [HSC025KG] = "025KG", 123 [HSC040KG] = "040KG", [HSC060KG] = "060KG", [HSC100KG] = "100KG", 124 [HSC160KG] = "160KG", [HSC250KG] = "250KG", [HSC400KG] = "400KG", 125 [HSC600KG] = "600KG", [HSC001GG] = "001GG", [HSC015PA] = "015PA", 126 [HSC030PA] = "030PA", [HSC060PA] = "060PA", [HSC100PA] = "100PA", 127 [HSC150PA] = "150PA", [HSC0_5ND] = "0.5ND", [HSC001ND] = "001ND", 128 [HSC002ND] = "002ND", [HSC004ND] = "004ND", [HSC005ND] = "005ND", 129 [HSC010ND] = "010ND", [HSC020ND] = "020ND", [HSC030ND] = "030ND", 130 [HSC001PD] = "001PD", [HSC005PD] = "005PD", [HSC015PD] = "015PD", 131 [HSC030PD] = "030PD", [HSC060PD] = "060PD", [HSC001NG] = "001NG", 132 [HSC002NG] = "002NG", [HSC004NG] = "004NG", [HSC005NG] = "005NG", 133 [HSC010NG] = "010NG", [HSC020NG] = "020NG", [HSC030NG] = "030NG", 134 [HSC001PG] = "001PG", [HSC005PG] = "005PG", [HSC015PG] = "015PG", 135 [HSC030PG] = "030PG", [HSC060PG] = "060PG", [HSC100PG] = "100PG", 136 [HSC150PG] = "150PG", 137}; 138 139/** 140 * struct hsc_range_config - list of pressure ranges based on nomenclature 141 * @pmin: lowest pressure that can be measured 142 * @pmax: highest pressure that can be measured 143 */ 144struct hsc_range_config { 145 const s32 pmin; 146 const s32 pmax; 147}; 148 149/* All min max limits have been converted to pascals */ 150static const struct hsc_range_config hsc_range_config[HSC_VARIANTS_MAX] = { 151 [HSC001BA] = { .pmin = 0, .pmax = 100000 }, 152 [HSC1_6BA] = { .pmin = 0, .pmax = 160000 }, 153 [HSC2_5BA] = { .pmin = 0, .pmax = 250000 }, 154 [HSC004BA] = { .pmin = 0, .pmax = 400000 }, 155 [HSC006BA] = { .pmin = 0, .pmax = 600000 }, 156 [HSC010BA] = { .pmin = 0, .pmax = 1000000 }, 157 [HSC1_6MD] = { .pmin = -160, .pmax = 160 }, 158 [HSC2_5MD] = { .pmin = -250, .pmax = 250 }, 159 [HSC004MD] = { .pmin = -400, .pmax = 400 }, 160 [HSC006MD] = { .pmin = -600, .pmax = 600 }, 161 [HSC010MD] = { .pmin = -1000, .pmax = 1000 }, 162 [HSC016MD] = { .pmin = -1600, .pmax = 1600 }, 163 [HSC025MD] = { .pmin = -2500, .pmax = 2500 }, 164 [HSC040MD] = { .pmin = -4000, .pmax = 4000 }, 165 [HSC060MD] = { .pmin = -6000, .pmax = 6000 }, 166 [HSC100MD] = { .pmin = -10000, .pmax = 10000 }, 167 [HSC160MD] = { .pmin = -16000, .pmax = 16000 }, 168 [HSC250MD] = { .pmin = -25000, .pmax = 25000 }, 169 [HSC400MD] = { .pmin = -40000, .pmax = 40000 }, 170 [HSC600MD] = { .pmin = -60000, .pmax = 60000 }, 171 [HSC001BD] = { .pmin = -100000, .pmax = 100000 }, 172 [HSC1_6BD] = { .pmin = -160000, .pmax = 160000 }, 173 [HSC2_5BD] = { .pmin = -250000, .pmax = 250000 }, 174 [HSC004BD] = { .pmin = -400000, .pmax = 400000 }, 175 [HSC2_5MG] = { .pmin = 0, .pmax = 250 }, 176 [HSC004MG] = { .pmin = 0, .pmax = 400 }, 177 [HSC006MG] = { .pmin = 0, .pmax = 600 }, 178 [HSC010MG] = { .pmin = 0, .pmax = 1000 }, 179 [HSC016MG] = { .pmin = 0, .pmax = 1600 }, 180 [HSC025MG] = { .pmin = 0, .pmax = 2500 }, 181 [HSC040MG] = { .pmin = 0, .pmax = 4000 }, 182 [HSC060MG] = { .pmin = 0, .pmax = 6000 }, 183 [HSC100MG] = { .pmin = 0, .pmax = 10000 }, 184 [HSC160MG] = { .pmin = 0, .pmax = 16000 }, 185 [HSC250MG] = { .pmin = 0, .pmax = 25000 }, 186 [HSC400MG] = { .pmin = 0, .pmax = 40000 }, 187 [HSC600MG] = { .pmin = 0, .pmax = 60000 }, 188 [HSC001BG] = { .pmin = 0, .pmax = 100000 }, 189 [HSC1_6BG] = { .pmin = 0, .pmax = 160000 }, 190 [HSC2_5BG] = { .pmin = 0, .pmax = 250000 }, 191 [HSC004BG] = { .pmin = 0, .pmax = 400000 }, 192 [HSC006BG] = { .pmin = 0, .pmax = 600000 }, 193 [HSC010BG] = { .pmin = 0, .pmax = 1000000 }, 194 [HSC100KA] = { .pmin = 0, .pmax = 100000 }, 195 [HSC160KA] = { .pmin = 0, .pmax = 160000 }, 196 [HSC250KA] = { .pmin = 0, .pmax = 250000 }, 197 [HSC400KA] = { .pmin = 0, .pmax = 400000 }, 198 [HSC600KA] = { .pmin = 0, .pmax = 600000 }, 199 [HSC001GA] = { .pmin = 0, .pmax = 1000000 }, 200 [HSC160LD] = { .pmin = -160, .pmax = 160 }, 201 [HSC250LD] = { .pmin = -250, .pmax = 250 }, 202 [HSC400LD] = { .pmin = -400, .pmax = 400 }, 203 [HSC600LD] = { .pmin = -600, .pmax = 600 }, 204 [HSC001KD] = { .pmin = -1000, .pmax = 1000 }, 205 [HSC1_6KD] = { .pmin = -1600, .pmax = 1600 }, 206 [HSC2_5KD] = { .pmin = -2500, .pmax = 2500 }, 207 [HSC004KD] = { .pmin = -4000, .pmax = 4000 }, 208 [HSC006KD] = { .pmin = -6000, .pmax = 6000 }, 209 [HSC010KD] = { .pmin = -10000, .pmax = 10000 }, 210 [HSC016KD] = { .pmin = -16000, .pmax = 16000 }, 211 [HSC025KD] = { .pmin = -25000, .pmax = 25000 }, 212 [HSC040KD] = { .pmin = -40000, .pmax = 40000 }, 213 [HSC060KD] = { .pmin = -60000, .pmax = 60000 }, 214 [HSC100KD] = { .pmin = -100000, .pmax = 100000 }, 215 [HSC160KD] = { .pmin = -160000, .pmax = 160000 }, 216 [HSC250KD] = { .pmin = -250000, .pmax = 250000 }, 217 [HSC400KD] = { .pmin = -400000, .pmax = 400000 }, 218 [HSC250LG] = { .pmin = 0, .pmax = 250 }, 219 [HSC400LG] = { .pmin = 0, .pmax = 400 }, 220 [HSC600LG] = { .pmin = 0, .pmax = 600 }, 221 [HSC001KG] = { .pmin = 0, .pmax = 1000 }, 222 [HSC1_6KG] = { .pmin = 0, .pmax = 1600 }, 223 [HSC2_5KG] = { .pmin = 0, .pmax = 2500 }, 224 [HSC004KG] = { .pmin = 0, .pmax = 4000 }, 225 [HSC006KG] = { .pmin = 0, .pmax = 6000 }, 226 [HSC010KG] = { .pmin = 0, .pmax = 10000 }, 227 [HSC016KG] = { .pmin = 0, .pmax = 16000 }, 228 [HSC025KG] = { .pmin = 0, .pmax = 25000 }, 229 [HSC040KG] = { .pmin = 0, .pmax = 40000 }, 230 [HSC060KG] = { .pmin = 0, .pmax = 60000 }, 231 [HSC100KG] = { .pmin = 0, .pmax = 100000 }, 232 [HSC160KG] = { .pmin = 0, .pmax = 160000 }, 233 [HSC250KG] = { .pmin = 0, .pmax = 250000 }, 234 [HSC400KG] = { .pmin = 0, .pmax = 400000 }, 235 [HSC600KG] = { .pmin = 0, .pmax = 600000 }, 236 [HSC001GG] = { .pmin = 0, .pmax = 1000000 }, 237 [HSC015PA] = { .pmin = 0, .pmax = 103421 }, 238 [HSC030PA] = { .pmin = 0, .pmax = 206843 }, 239 [HSC060PA] = { .pmin = 0, .pmax = 413685 }, 240 [HSC100PA] = { .pmin = 0, .pmax = 689476 }, 241 [HSC150PA] = { .pmin = 0, .pmax = 1034214 }, 242 [HSC0_5ND] = { .pmin = -125, .pmax = 125 }, 243 [HSC001ND] = { .pmin = -249, .pmax = 249 }, 244 [HSC002ND] = { .pmin = -498, .pmax = 498 }, 245 [HSC004ND] = { .pmin = -996, .pmax = 996 }, 246 [HSC005ND] = { .pmin = -1245, .pmax = 1245 }, 247 [HSC010ND] = { .pmin = -2491, .pmax = 2491 }, 248 [HSC020ND] = { .pmin = -4982, .pmax = 4982 }, 249 [HSC030ND] = { .pmin = -7473, .pmax = 7473 }, 250 [HSC001PD] = { .pmin = -6895, .pmax = 6895 }, 251 [HSC005PD] = { .pmin = -34474, .pmax = 34474 }, 252 [HSC015PD] = { .pmin = -103421, .pmax = 103421 }, 253 [HSC030PD] = { .pmin = -206843, .pmax = 206843 }, 254 [HSC060PD] = { .pmin = -413685, .pmax = 413685 }, 255 [HSC001NG] = { .pmin = 0, .pmax = 249 }, 256 [HSC002NG] = { .pmin = 0, .pmax = 498 }, 257 [HSC004NG] = { .pmin = 0, .pmax = 996 }, 258 [HSC005NG] = { .pmin = 0, .pmax = 1245 }, 259 [HSC010NG] = { .pmin = 0, .pmax = 2491 }, 260 [HSC020NG] = { .pmin = 0, .pmax = 4982 }, 261 [HSC030NG] = { .pmin = 0, .pmax = 7473 }, 262 [HSC001PG] = { .pmin = 0, .pmax = 6895 }, 263 [HSC005PG] = { .pmin = 0, .pmax = 34474 }, 264 [HSC015PG] = { .pmin = 0, .pmax = 103421 }, 265 [HSC030PG] = { .pmin = 0, .pmax = 206843 }, 266 [HSC060PG] = { .pmin = 0, .pmax = 413685 }, 267 [HSC100PG] = { .pmin = 0, .pmax = 689476 }, 268 [HSC150PG] = { .pmin = 0, .pmax = 1034214 }, 269}; 270 271/** 272 * hsc_measurement_is_valid() - validate last conversion via status bits 273 * @data: structure containing instantiated sensor data 274 * Return: true only if both status bits are zero 275 * 276 * the two MSB from the first transfered byte contain a status code 277 * 00 - normal operation, valid data 278 * 01 - device in factory programming mode 279 * 10 - stale data 280 * 11 - diagnostic condition 281 */ 282static bool hsc_measurement_is_valid(struct hsc_data *data) 283{ 284 return !(data->buffer[0] & HSC_STATUS_MASK); 285} 286 287static int hsc_get_measurement(struct hsc_data *data) 288{ 289 const struct hsc_chip_data *chip = data->chip; 290 int ret; 291 292 ret = data->recv_cb(data); 293 if (ret < 0) 294 return ret; 295 296 data->is_valid = chip->valid(data); 297 if (!data->is_valid) 298 return -EAGAIN; 299 300 return 0; 301} 302 303static irqreturn_t hsc_trigger_handler(int irq, void *private) 304{ 305 struct iio_poll_func *pf = private; 306 struct iio_dev *indio_dev = pf->indio_dev; 307 struct hsc_data *data = iio_priv(indio_dev); 308 int ret; 309 310 ret = hsc_get_measurement(data); 311 if (ret) 312 goto error; 313 314 memcpy(&data->scan.chan[0], &data->buffer[0], 2); 315 memcpy(&data->scan.chan[1], &data->buffer[2], 2); 316 317 iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, 318 iio_get_time_ns(indio_dev)); 319 320error: 321 iio_trigger_notify_done(indio_dev->trig); 322 323 return IRQ_HANDLED; 324} 325 326/* 327 * IIO ABI expects 328 * value = (conv + offset) * scale 329 * 330 * datasheet provides the following formula for determining the temperature 331 * temp[C] = conv * a + b 332 * where a = 200/2047; b = -50 333 * 334 * temp[C] = (conv + (b/a)) * a * (1000) 335 * => 336 * scale = a * 1000 = .097703957 * 1000 = 97.703957 337 * offset = b/a = -50 / .097703957 = -50000000 / 97704 338 * 339 * based on the datasheet 340 * pressure = (conv - Omin) * Q + Pmin = 341 * ((conv - Omin) + Pmin/Q) * Q 342 * => 343 * scale = Q = (Pmax - Pmin) / (Omax - Omin) 344 * offset = Pmin/Q - Omin = Pmin * (Omax - Omin) / (Pmax - Pmin) - Omin 345 */ 346static int hsc_read_raw(struct iio_dev *indio_dev, 347 struct iio_chan_spec const *channel, int *val, 348 int *val2, long mask) 349{ 350 struct hsc_data *data = iio_priv(indio_dev); 351 int ret; 352 u32 recvd; 353 354 switch (mask) { 355 case IIO_CHAN_INFO_RAW: 356 ret = hsc_get_measurement(data); 357 if (ret) 358 return ret; 359 360 recvd = get_unaligned_be32(data->buffer); 361 switch (channel->type) { 362 case IIO_PRESSURE: 363 *val = FIELD_GET(HSC_PRESSURE_MASK, recvd); 364 return IIO_VAL_INT; 365 case IIO_TEMP: 366 *val = FIELD_GET(HSC_TEMPERATURE_MASK, recvd); 367 return IIO_VAL_INT; 368 default: 369 return -EINVAL; 370 } 371 372 case IIO_CHAN_INFO_SCALE: 373 switch (channel->type) { 374 case IIO_TEMP: 375 *val = 97; 376 *val2 = 703957; 377 return IIO_VAL_INT_PLUS_MICRO; 378 case IIO_PRESSURE: 379 *val = data->p_scale; 380 *val2 = data->p_scale_dec; 381 return IIO_VAL_INT_PLUS_NANO; 382 default: 383 return -EINVAL; 384 } 385 386 case IIO_CHAN_INFO_OFFSET: 387 switch (channel->type) { 388 case IIO_TEMP: 389 *val = -50000000; 390 *val2 = 97704; 391 return IIO_VAL_FRACTIONAL; 392 case IIO_PRESSURE: 393 *val = data->p_offset; 394 *val2 = data->p_offset_dec; 395 return IIO_VAL_INT_PLUS_MICRO; 396 default: 397 return -EINVAL; 398 } 399 400 default: 401 return -EINVAL; 402 } 403} 404 405static const struct iio_chan_spec hsc_channels[] = { 406 { 407 .type = IIO_PRESSURE, 408 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 409 BIT(IIO_CHAN_INFO_SCALE) | 410 BIT(IIO_CHAN_INFO_OFFSET), 411 .scan_index = 0, 412 .scan_type = { 413 .sign = 'u', 414 .realbits = 14, 415 .storagebits = 16, 416 .endianness = IIO_BE, 417 }, 418 }, 419 { 420 .type = IIO_TEMP, 421 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 422 BIT(IIO_CHAN_INFO_SCALE) | 423 BIT(IIO_CHAN_INFO_OFFSET), 424 .scan_index = 1, 425 .scan_type = { 426 .sign = 'u', 427 .realbits = 11, 428 .storagebits = 16, 429 .shift = 5, 430 .endianness = IIO_BE, 431 }, 432 }, 433 IIO_CHAN_SOFT_TIMESTAMP(2), 434}; 435 436static const struct iio_info hsc_info = { 437 .read_raw = hsc_read_raw, 438}; 439 440static const struct hsc_chip_data hsc_chip = { 441 .valid = hsc_measurement_is_valid, 442 .channels = hsc_channels, 443 .num_channels = ARRAY_SIZE(hsc_channels), 444}; 445 446int hsc_common_probe(struct device *dev, hsc_recv_fn recv) 447{ 448 struct hsc_data *hsc; 449 struct iio_dev *indio_dev; 450 const char *triplet; 451 s64 tmp; 452 int ret; 453 454 indio_dev = devm_iio_device_alloc(dev, sizeof(*hsc)); 455 if (!indio_dev) 456 return -ENOMEM; 457 458 hsc = iio_priv(indio_dev); 459 460 hsc->chip = &hsc_chip; 461 hsc->recv_cb = recv; 462 hsc->dev = dev; 463 464 ret = device_property_read_u32(dev, "honeywell,transfer-function", 465 &hsc->function); 466 if (ret) 467 return dev_err_probe(dev, ret, 468 "honeywell,transfer-function could not be read\n"); 469 if (hsc->function > HSC_FUNCTION_F) 470 return dev_err_probe(dev, -EINVAL, 471 "honeywell,transfer-function %d invalid\n", 472 hsc->function); 473 474 ret = device_property_read_string(dev, "honeywell,pressure-triplet", 475 &triplet); 476 if (ret) 477 return dev_err_probe(dev, ret, 478 "honeywell,pressure-triplet could not be read\n"); 479 480 if (str_has_prefix(triplet, "NA")) { 481 ret = device_property_read_u32(dev, "honeywell,pmin-pascal", 482 &hsc->pmin); 483 if (ret) 484 return dev_err_probe(dev, ret, 485 "honeywell,pmin-pascal could not be read\n"); 486 487 ret = device_property_read_u32(dev, "honeywell,pmax-pascal", 488 &hsc->pmax); 489 if (ret) 490 return dev_err_probe(dev, ret, 491 "honeywell,pmax-pascal could not be read\n"); 492 } else { 493 ret = device_property_match_property_string(dev, 494 "honeywell,pressure-triplet", 495 hsc_triplet_variants, 496 HSC_VARIANTS_MAX); 497 if (ret < 0) 498 return dev_err_probe(dev, -EINVAL, 499 "honeywell,pressure-triplet is invalid\n"); 500 501 hsc->pmin = hsc_range_config[ret].pmin; 502 hsc->pmax = hsc_range_config[ret].pmax; 503 } 504 505 if (hsc->pmin >= hsc->pmax) 506 return dev_err_probe(dev, -EINVAL, 507 "pressure limits are invalid\n"); 508 509 ret = devm_regulator_get_enable(dev, "vdd"); 510 if (ret) 511 return dev_err_probe(dev, ret, "can't get vdd supply\n"); 512 513 hsc->outmin = hsc_func_spec[hsc->function].output_min; 514 hsc->outmax = hsc_func_spec[hsc->function].output_max; 515 516 tmp = div_s64(((s64)(hsc->pmax - hsc->pmin)) * MICRO, 517 hsc->outmax - hsc->outmin); 518 hsc->p_scale = div_s64_rem(tmp, NANO, &hsc->p_scale_dec); 519 tmp = div_s64(((s64)hsc->pmin * (s64)(hsc->outmax - hsc->outmin)) * MICRO, 520 hsc->pmax - hsc->pmin); 521 tmp -= (s64)hsc->outmin * MICRO; 522 hsc->p_offset = div_s64_rem(tmp, MICRO, &hsc->p_offset_dec); 523 524 indio_dev->name = "hsc030pa"; 525 indio_dev->modes = INDIO_DIRECT_MODE; 526 indio_dev->info = &hsc_info; 527 indio_dev->channels = hsc->chip->channels; 528 indio_dev->num_channels = hsc->chip->num_channels; 529 530 ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL, 531 hsc_trigger_handler, NULL); 532 if (ret) 533 return ret; 534 535 return devm_iio_device_register(dev, indio_dev); 536} 537EXPORT_SYMBOL_NS(hsc_common_probe, IIO_HONEYWELL_HSC030PA); 538 539MODULE_AUTHOR("Petre Rodan <petre.rodan@subdimension.ro>"); 540MODULE_DESCRIPTION("Honeywell HSC and SSC pressure sensor core driver"); 541MODULE_LICENSE("GPL"); 542